Technically this is a L but it fits like a S/M - jacket is slim and runs small. I’d say most like a size 4. Please note lie-flat measurements: pit-to-pit 19” / top-to-bottom 25” / sleeve 23” Adorable A-line jacket with back vent, wrap-around triangle pockets, slightly cropped sleeves and contrasting green stitching. Made in CA. Worn once.